Delhi Metro Rail Corporation (DMRC) and the concessionaire of Delhi Airport Metro Express, Reliance Infra have decided to go in for arbitration over their disagreements following detection of cracks in the line that resulted in the closure of the line in July.

Reliance Infra, which is a subsidiary of Reliance Anil Dhirubhai Ambani Group, had earlier accused the DMRC of forcing it to use faulty chips in the underground section. The company has complained to the Union Urban Development Ministry that it was under pressure from the DMRC to use ssloh fastening clips for the underground section of the airport metro line in Delhi.

After an inspection of the line, it was found that about four per cent of the ssloh fastening clips were damaged. The company said that DMRC forced the concessionaire to keep the traisn operational even as it had identified faults in the line. Reliance Infrastructure said DMRC did not agree to a suggestion put forward by the company and put forward a list of companies to source clips and the list included Vossloh.

DMRC Chairman Mangu Singh said that the DMRC has not accepted DAME's request for restructuring and is now transferring the case for attribution. Reliance Infra CEO Lalit Jalan did not announce details about the restructuring being requested by the company.

The authorities had to close down the Airport Metro Line because of repairs after the company found serious faults in civil works and the clips that were used in the underground stretches of the line.